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Bonjour;

A = 4x+8

A =4x +4*2

A =4(x+2)

B = 36-4x

B = 4*9 -4x

B =4( 9-x)

C=4x-4

C = 4x-4*1

C =4( x-1)

D = 4x²-8x

D = 4x²-4x*2

D =4x (x-2)